Physics · Bernoulli's principle and its applications
A device based on multiple reflection used as hearing aid.
A device based on multiple reflection used as hearing aid.
- A. bulb horn
- B. ear trumpet
- C. megaphone
- D. all
Step-by-step solution
An ear trumpet is a conical tube that collects sound waves and directs them into the ear, using multiple reflections to enhance sound for the hearing impaired. Bulb horn and megaphone are not hearing aids; bulb horn is a sound-producing device, and megaphone amplifies outgoing sound.
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